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Property/Method Type R/W Description

returnValue

Boolean R/W The developer sets this to false in order to cancel the

default action for the event.

screenX

Integer R/W The x-coordinate of the mouse pointer relative to the

entire computer screen

screenY

Integer R/W The y-coordinate of the mouse pointer relative to the

entire computer screen

shiftKey

Boolean R/W True indicates the Shift key is pressed; false indicates it

is not.

srcElement

Element R/W The element that caused the event.

toElement

Element R/W The element that the mouse is entering during some

mouse events.

type

String R/W The name of the event.

Integer R/W The x-coordinate of the mouse pointer relative to the

parent element of the element that caused the event

Integer R/W The y-coordinate of the mouse pointer relative to the

parent element of the element that caused the event

DOM

The DOM event object contains similar core properties and methods with some important differences.

The following table enumerates them.

Property/Method Type R/W Description

altKey

Boolean R/W True indicates the ALT key is pressed; false indicates it

is not.

bubbles

Boolean R

Indicates if the event bubbles.

button

Integer R/W The mouse button that has been pressed for certain

mouse events. Values:

0 – No button is pressed.

1 – Left button is pressed.

2 – Right button is pressed.

3 – Left and right buttons are both pressed.

4 – Middle button is pressed.

5 – Left and middle buttons are both pressed.

6 – Right and middle buttons are both pressed.

7 – Left, middle, and right buttons are all pressed.

cancelable

Boolean R

Indicates if the event can be cancelled.

cancelBubble

Boolean R

Indicates whether event bubbling has been cancelled

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